nobody mad just yet I hope. Rather see stuff said now then mid comp as we had before.
Couple suggestions what could be considered - none of these were neck breaking as is, but changing them could make some stuff more interesting.
-DDR2 freq is currently pretty obvious classic d9gmh + p45. If you want more action maybe disallow one of the two (though I bet most wouldn’t mind keeping both allowed, I am not opposed, just throwing in the idea)
-DDR3 freq same problem, just instead mfr + haswell. Alternative idea: Dual channel required with no capacity lock so other ics might be viable.
-DDR4 3d03 no dx12 cards? odd choice but okay